Internal combustion engine



. A. w. SCARRATT ET AL 2,327,932

INTERNAL COMBUSTION ENGINE Aug. 24, 1943.

Filed Aug. 10, 1942 2 Sheets-Sheet 1 m 9 r 7 v NN g .d a; 0 2 i fl a? bw fl M "WNW BM 1% M J x mN m A. W. SCARRATT ET AL INTERNAL COMBUSTION ENGINE Filed Aug. 10, 1942- 2 Sheets-Sheet 2,

I LkPJYWSCQTZ'dZZ Mg zzsZ'aUe llzzraderg, 69 Rama) Patented Aug. 24, 1943 INTERNAL COMBUSTION ENGINE Albert W. Scarratt, Kcnilworth, and Gustave E.

Lundberg, Riverside, llL, assignors to International Harvester Company, a corporation oi New Jersey Application August 10, 1942, Serial No. 454,206

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This invention relates to an internal combustion engine and more particularly to improvements in the arrangement of parts thereof with respect to the cooling system.

The invention is especially adapted for use in conjunction with an internal combustion engine of the stationary type. Such an engine ordinarily comprises an engine block, a cylinder, a water jacket, and a hopper disposed above the water jacket and cylinder for containing water to cool the engine. In most cases the engine is not equipped with a radiator, such as is common in automotive vehicles. It has heretofore been proposed to equip such engines with a radiator and to provide a fan driven by means connected to the engine fly-wheel or crank shaft. However, such arrangements are usually quite expensive and involve the use of special driving means for the fan.

According toa preferred form of the present invention, these disadvantages are obviated by the provision of a novel arrangement by which an engine of the type referred to above is equipped with a radiator cooling system and with an air cooling system operated in a simple and emcient manner by the engine fly-wheel.

The principal object of the present invention is to provide an improved construction of the type referred to.

An important object is to provide an internal combustion engine with a radiator and an air for distributing the air over the surface of the radiator core.

The foregoing and other desirable objects and features of the invention will be mad more apparent from the following detailed description taken in conjunction with the accompanying sheets of drawings, in which:

Figure 1 is a side elevational view of one side of an internal combustion engine equipped with a preferred form of the invention;

- Figure 2 is a similar view from the other side of the engine, shown partly in section;

Figure 3 is an enlarged fragmentary View taken on the line 3-3 of Figure 1;

Figure 4 is a rear view of the engine shown sectional in Figures 1 and 2;

of the hood or ings illustrate and the following description will refer to such an engine; although it is to be understood that this description is only reprecooling system including a driven fan and an air conducting conduit or housing between the fan and the radiator.

Another important'object is to provide an air cooling system as an attachment for an internal combustion engine of the stationary type, said system including a fan carried by the engine fly-wheel and housed within a hood or housing structure that is connected to conduct air to the radiator.

Another object is to provid an air cooling system in which the air is received by the fan in a direction axially thereof, said air being then discharged radially of the fan to the radiator of the engine.

Another object is to provide the housing or hood structure in unitary form and to provide for the detachable mounting of said structure on an internal combustion engine and particularly to provide such structure as a unit attachment for a stationary engine of conventional construction.

And still another object is to provide means sentative and not limiting.

The internal combustion engine herein illustrated comprises an engine block ill carried on a pair of sills H and including a cylinder l2, cylinder head is, and water jacket it surrounding the cylinder and having its upperportion formed integrally with a container or hopper l5 adapted to contain water for cooling the cylinder 02. i A smaller jacket is is positioned in the hopper and surrounds valve operating mechanism, indicated generally at H. The engine is provided with a crank. shaft I B rotatable on an axis transverse to the cylinder l2 and having keyed thereto a fly wheel [-9. The construction just described is generally conventional, and an engine so constructed is ordinarily cooled simply by the water or other coolant contained in the hopper l5.

Asstated previously, an object of the invention is to improve the cooling system for an internal combustion engine, particularly for an enine of the stationary type. To this. end the engine illustrated is provided with a radiator 20 mounted on the upper portion of the hopper l5 and including a core 2| of conventional construction connected in watepcirculating relationship with the hopper. The radiator includes a lower water tank 22 connected by a conduit 23 to a lowerportion of the hopper l5, as at 24. The

radiator includes an upper water tank 25 including a usual filler neck .26 and connected by a pipe or conduit 21 to the upper portion of the hopper l5. This last named connection is preferably formed by means of a connecting member 28 havinga flanged portion 29 that seats on the upper surface of the hopper and a sleeve portion 38 that fits the pipe or hose 21. The upper portion of the hopper is formed with a circular opening in which is carried a gasket 3| of rubber or similar material. A ring 32 is secured by a bolt 33 to the connecting member 28, and the gasket 3| is securely held in place thereby. The construction just described completes the watercirculating system of the engine.

The crank shaft l6 serves through the medium of the fly-wheel l9 to drive means for circulating air through the radiator core 'of the radiator 28. In a preferred form of the invention,

this means includes a circulating fan 34 secured by a plurality of bolts 35 to the rear face of the fiy-wheel l9. In the present case, the bolts 35 serve also to secure in place a member 36, by means of which the engine may be started by a hand crank, not shown. This fan is preferably of the blower type comprising a plurality of circumferentially spaced, axially and radially extending vanes 31, as shown particularly in Figures 2 and 4.

One of the most important features of the present invention is the provision of air-circulating means of the type that eliminates the necessity of special driving means for the circulating fan. It will be observed that the fan in this case is driven by the simple expedient of the mounting means that secures it to the fly-wheel l9. Since the fan 34 is remote from the radiator 20, it is necessary to provide means for conducting the air from the fan through and to the radiator. In the present instance, this means comprises a housing or hood structure indicated generally at 38 and including a rear vertical wall 39 and an outer vertical wall 40 spaced from the wall 39. These walls are arranged respectively at opposite sides of the fan 34 and extend upwardly and forwardly respectively to vertically spaced, horizontal walls 4| and 42. As will be hereinafter described, the wall 42 is not an integral part of the wall portion 48 but is made up of a plurality of lesser portions. The walls 39 and 48 and 4| and 42 are connected by a pair of horizontally spaced.

vertical .walls 43, the lower portions of which form a cylindrical enclosure portion 44 concentrio with the axis of rotation of the fan 34.

The lower portion of the housing or hood structure 38 is preferably detachably connected to the engine block l0, means being provided in the form of a connecting'member 45 secured to the hood 38 as by welding and detachably se cured to the engine block, preferably by means of a single bolt 46. The horizontal wall portion 4| of the hood is provided at its forward end with an open portion or slot 41, and the forward edges are turned down, as at 48. The slot .41 fits around the pipe or conduit 21, and the turned-down portions 48 tightly abut the radiator 20, as best shown in Figure l. The wall 4| further carries a transverse supporting member 49 adapted to rest on the upper surface of the hopper l5. The side walls 43 are each provided at vertically spaced portions of the forward edge thereof with openings 50 adapted to receive bolts by means of which the hood 38 is secured to opposite sides of theradiator 20.

Since the hood is of light weight construction, the supporting means just described is adequate to mount the hood in position on the engine to form a substantial enclosure for the fan 34 and the rear portion of the radiator 28. The crosssectional dimension of the hood at its upper portion is substantially equal to the area presented by the rear face of the vertical radiator core 2|. The rear wall 40 of the hood is provided with an opening 52, by means of which .the fan 34 receives air in a direction axially thereof. The fan operates to discharge air radially thereof and upwardly through the hood 38 to the radiator 20.

As previously stated, the upper wall portion 42 of the hood comprises a number of lesser portions, the first of which consists of a transverse bracing member 53 cross-connecting the vertical walls 43 and having an opening or slot 54 therein to fit the upper portion of the pipe or conduit 21. The rear wall 40 of the hood terminates at a point substantially in horizontal alinement with the lower horizontal wall 4|, and there is thus provided between the terminating edge of the wall 48 and the rear edge of the transverse brace 53 an opening 55 of substantial size. A cover 56 (Figure 6) is removably secured to the hood over this opening, preferably by means of a plurality of securing means in the form of bolts 51.

In order that the air discharged by the fan 34 may be distributed over the radiator core 2|, the hood is provided with deflector or baffle means.

This means preferablycomprises an arcuate baflie 1 or deflector 58 supported by a plurality of leg portions 59 on the inner surface of the cover' 56. As best shown in Figure 1, the bafile 58 divides the vertical space between the upper and lower walls 42 and 4| into a pair of air conduits. This arrangement provides for adequate distribution of air over the entire surface of the radiator core 2| and particularly over the lower portion thereof.

The rear portion of the hood 38 is provided at one side thereof with a hinge 68 on which is mounted a cover 6| closed by a screen 62. The opposite side of the hood carries a latch 63 which cooperates with a portion 64 on the screen cover 6| to maintain the cover in place. This cover is so positioned as to close the opening 52 in the rear portion of the hood 38 and accordingly provides a screen for incoming air to the fan 34. Because of the latch 63 and hinge 60, the cover 6| may be swung open so that access may be had to the interior structure and particularly to the starting member 36.

'It is thought that the operation of the cooling system will be apparent from the foregoing description of the structure thereof. It is to be observed that this structure is comparatively simple and provides an efficient means for cooling the radiator of the engine. As previously stated, an important, object of the invention is to provide the improved cooling system as an attachment for a stationary engine of conventional construction. It will be noted that this purpose is admirably served by means of the unitary sheetmetal structure comprising the hood 38 and the means by which it can be detachably mounted on the engine.

Other features of the invention will suggest themselves to those versed in the art, and it will be appreciated that various modifications and alterations may be made in the preferred form of the invention illustrated and described without departing from the spirit and scope of the invention as defined in the appended claims.

What is claimed is:

1. In an internal combustion engine having a water jacket and including a fly-wheel rotatable on a horizontal axis, the combination of a radiator supported in vertically extended relation above the engine and at a level above the flywheel and including coolant-circulating connections to the water jacket; a fan carried by the fly-wheel concentrically thereof and at the outer side of the fly-wheel away from the water jacket; a unitary, sheet-metal housing structure formed to enclose the fan and fly-wheel and having a portion extending upwardly to cover one side of the radiator, to provide a conduit for an air stream from the fan to the radiator; said housing having an opening alined with the outer, radial face of the fan for the direct inlet of air unobstructed by the fly-wheel; a removable screened cover over said opening; and means detachably securing said housing structure to the engine and to the radiator.

2. The combination set forth in claim 1 in which the radiator includes a radiator core having at one side thereof a vertical face, and the housing structure includes a baflle element therein to distribute the air stream over the radiator core.

3. The combination set forth in claim 1 in which the radiator includes a radiator core having at one side thereof a vertical face, and the housing structure includes an opening in the vicinity of the radiator, a removable cover over said opening, and a baiiie element carried by the cover and disposed within the housing structure in the path of the air stream to distribute the air stream over the radiator core.

4. In an internal combustion engine having a Water jacket and including a fly-wheel rotatable on a horizontal axis, the combination of a radiator supported in vertically extended relation above the engine and at a level above the-flywheel and including coolant-circulating connections to the water jacket; a fan carried by the fly-wheel concentrically thereof and at the outer side of the fiy-wheel away from the water jacket; a unitary, sheet-metal housing structure formed to enclose the fan and the fly-wheel and having a portion extending upwardly to cover one side of the radiator, to provide a conduit for an air stream from the fan to theradiator; said housing having an opening alined with the outer, radial face of the fan for the direct inlet of air unobstructed by the fly-wheel; and means securing said housing structure to the engine.

5. The combination set forth in claim 4, in which the housing structure has a second opening between the fan and radiator, and a removable cover structure over said opening including a baflie element disposed Within the housing structure in the'path of the air stream to distribute said air stream over the radiator.

6. The combination set forth in claim 4, in which thehousing structure has a baiiie element disposed therein in the path of the air stream to distribute said air stream over the radiator.

7. In an internal combustion engine having a water jacket and including a fly-wheel, the combination of a radiator disposed over the engine and above the level of the fly-wheel and including coolant-circulating connections to the water jacket, an air-circulating fan carried by the flywheel at the outer side thereof away from the water jacket, and a housing structure enclosing the fan and extending upwardly to cover one side of the radiator to provide an air conduit from the fan to the radiator, said housing having an opening adjacent the outer side of the fan away from the fiy-wheel for the direct inlet of air unobthe fan and extending to the radiator to provide an air conduit from the fan to the radiator, said housing having an opening adjacent the fan for the unobstructed inlet of air.

9. For an internal combustion engine having a horizontal cylinder, a water jacket surrounding the cylinder, a hopper mounted above the cylinder in communication with said jacket anda flywheel mounted for rotation on an axis transverse to the cylinder and below the hopper: a radiator mounted above the hopper in watercirculating communication therewith, a fan mounted on the fiy-wheel at the outer side thereof away from the water jacket for receiving air from an axial direction and discharging it radially, and a housing around said fan and extending upwardly to the radiator for delivering the air discharged from the fan through the radiator, said housing having an opening alined with the outer, radial face of the fan to provide a direct air inlet to the fan, unobstructed by the fly-wheel.

ALBERT W. SCARRATT. GUSTAVE E. LUNDBERG. 

